Welcome to Datum Gear! We offer the highest quality 80% Drill and Mill lower receiver jigs on the market, backed by our lifetime warranty. In fact, all of our products are guaranteed for life! We offer jigs, our own Datum Gear Kevlar 80% AR-15 lower receivers, and complete upper and lower kits for the DIY customer.

SUPPORT YOUR GUN RIGHTS SALE!

Datum Gear will donate a portion of these promotional sales to the Calguns Foundation. You get a great deal and they get some much needed financial support!

THE BEST JUST GOT BETTER! Our AR-15 drill and mill jig now features countersunk screw heads on the side and guide plates. Why? Some customers have drill presses or mills with short chucks, making it more time consuming to work around the screw heads with short mills.